JP6967926B2 - Discriminator and its manufacturing method - Google Patents

Description

The present invention relates to an discriminator capable of identifying an ID by a combination of a plurality of antennas and a method for manufacturing the discriminator.

In recent years, with the development of the information-oriented society, information is recorded on labels and tags attached to products and the like, and the products and the like are managed using these labels and tags. In information management using such labels and tags, non-contact IC labels and non-contact IC labels equipped with IC chips capable of writing and reading information in a non-contact state with respect to the labels and tags are used. Identifyers using RFID technology such as type IC tags are rapidly becoming widespread due to their excellent convenience.

The discriminator using such RFID technology is not limited to the one on which the IC chip is mounted as described above, but has a plurality of antennas having different resonance frequencies from each other, and can be used for a plurality of antennas without using the IC chip. It is also considered that the ID can be identified by a combination. For example, the shape of the dielectric element and the capacitor element that make up multiple antennas may be different, or the shape and orientation of multiple antennas may be different, so that the resonance frequency may be different for each of the multiple antennas, and the combination of the antennas may be used. A technique for expressing an ID is disclosed in Patent Document 1. Using this technology, when the number of antennas is N, it is possible to have two pieces of information, "1" and "0", depending on the presence or absence of one antenna, and unless all antennas are present. Therefore, (2 ^N -1) IDs can be represented in an identifiable manner.

By the way, as described above, when the ID is identifiable by the presence or absence of antennas having different resonance frequencies, antennas having different resonance frequencies are variably printed according to the ID, but the variable printing is compared with the fixed printing. Because of the low printing accuracy, the dimensions of the antenna formed by printing do not correspond to the resonance frequency of the antenna, which causes the ID to be generated accurately, unlike the one in which the resonance frequency of the antenna is set. There is a risk that you will not be able to do it.

Here, a plurality of wiring segments separated from each other are formed by analog printing, which is fixed printing, and connection segments are additionally formed between desired wiring segments by digital printing, which is variable printing, to form desired wiring. Patent Document 2 discloses a technique for connecting segments and thereby making the shape of an antenna different. Therefore, by using this technique, it becomes possible to accurately form antennas having different resonance frequencies from each other.

Special Fair 7-80386 Gazette Japanese Patent No. 5501601

By the way, as described above, in the case where a plurality of IDs can be identified by differentiating the shapes and orientations of the plurality of antennas according to the IDs, the end user can use the antennas according to the IDs managed by the company. You may want to process the shape and so on.

However, the technique disclosed in Patent Document 1 has a problem that it is difficult to process the antenna later according to the ID because the antenna itself having a different shape is formed. In particular, in the case where a protective layer or the like is laminated on the antenna in order to make a card, the antenna cannot be processed after that.

Further, in the technique disclosed in Patent Document 2, since the wiring segment is formed and then the connection segment is additionally formed between the desired wiring segments, the wiring segment is dried at a high temperature for drying. There is a problem that a furnace is required and processing according to a desired ID cannot be easily performed.

The present invention has been made in view of the problems of the prior art as described above, and is special in a configuration capable of identifying a desired ID in an discriminator capable of identifying an ID using an antenna. It is an object of the present invention to provide a discriminator which can be easily realized without using an apparatus and a method for manufacturing the discriminator.

In order to achieve the above object, the present invention
It has a first conductive layer and a plurality of antennas that are provided so as to face the first conductive layer via the first insulating layer and that generate a resonance peak by facing the first conductive layer. The first conductive layer has a shape that covers the antenna in a plan view, and the ID can be identified by the resonance frequencies or polarization directions of the plurality of antennas being different from each other.
The second conductive layer faces at least a part of the at least one antenna selected according to the ID among the plurality of antennas via the second insulating layer on the side opposite to the first conductive layer. Placed ,
The first and second insulating layers, the plurality of antennas, and the second conductive layer are provided on the front and back surfaces of the first conductive layer, respectively .

In the present invention configured as described above, since the resonance frequencies or the polarization directions of the plurality of antennas are different from each other, the antenna has a resonance peak in the resonance frequency and the polarization direction of each of the plurality of antennas. An ID consisting of several individual IDs can be identified. At that time, among the plurality of antennas in which the resonance peak is generated by being arranged to face the first conductive layer, the second conductive layer faces at least a part thereof on the opposite side to the first conductive layer. The resonance peak is not detected in the antenna, but the second conductive layer is attached to at least one antenna selected according to the ID among the plurality of antennas on the opposite side of the first conductive layer. Since the configuration is such that they are arranged to face each other via the second insulating layer, the first conductive layer is provided so as to face the first conductive layer via the first insulating layer, and the first conductive layer is provided. For a general-purpose tag having a plurality of antennas in which a resonance peak is generated by facing the layer and the first conductive layer covers the antenna in a plan view, the ID of the plurality of antennas is subsequently described. The desired ID can be identified by arranging the second conductive layer facing the at least one antenna selected according to the above method via the second insulating layer on the side opposite to the first conductive layer. The configuration can be easily realized.

The first and second insulating layers, a plurality of antennas, and the second conductive layer, in Rukoto provided respectively on the front and back of the first conductive layer, identify the ID and independent of any two sides of can do.

For an antenna as described above, if the Q value is 30 or less when the antenna is not facing the first conductive layer, the antenna faces the first conductive layer to develop a sharp resonance peak having a Q value of 30 or more. Can be made to.

Further, the print receiving layer and the print layer are arranged in this order on the surface side of the second insulating layer where the second conductive layer is provided so as to cover the second conductive layer, so that information can be obtained on the surface. It can be used as a displayed card.

The discriminator configured as described above creates a general-purpose tag by arranging the first conductive layer and the antenna so as to face each other via the first insulating layer, and then the first antenna. It is conceivable to manufacture by arranging the second insulating layer on the side opposite to the conductive layer of the above and then arranging the second conductive layer so as to face the antenna via the second insulating layer. ..

For example, the first conductive layer and the antenna are laminated on the front and back of the first insulating layer by a coating method using a conductive material or etching, respectively, and the second insulating layer is laminated with the first insulating layer on which the antenna is laminated. It is conceivable that the second conductive layer is laminated on the layer by a coating method or thermal pressure bonding, and the second conductive layer is laminated on the opposite side of the second insulating layer by thermal transfer using a conductive material.

According to the present invention, the second conductive layer is attached to at least one antenna selected according to the ID among the plurality of antennas via the second insulating layer on the opposite side of the first conductive layer. Since the configuration is such that they are arranged to face each other, the first conductive layer is provided facing the first conductive layer via the first insulating layer, and the resonance peak is formed by facing the first conductive layer. For a general-purpose tag having a plurality of antennas expressing the above and having a shape in which a first conductive layer covers the antennas in a plan view, at least one of the plurality of antennas is subsequently selected according to the ID. Desirable in an discriminator capable of identifying an ID using an antenna by arranging a second conductive layer facing each other via a second insulating layer on the side opposite to the first conductive layer. It is possible to easily realize a configuration in which the ID of the antenna can be identified without using a special device.

The first and second insulating layers, a plurality of antennas, and the second conductive layer, by respectively provided on the front and back of the first conductive layer, identify the ID and independent of any two sides of can do.

Further, in the case where the print receiving layer and the print layer are arranged in this order on the surface side of the second insulating layer where the second conductive layer is provided so as to cover the second conductive layer, the surface thereof. It can be used as a card on which information and patterns are displayed.

It is a figure which shows the 1st Embodiment of the discriminator of this invention, (a) is a surface view, (b) is the cross-sectional view of AA'shown in (a), (c) is the base base material. It is a figure which shows the structure of the laminated surface with a protective layer. It is sectional drawing for demonstrating the manufacturing method of the ID tag shown in FIG. It is a figure which shows the frequency characteristic of the ID tag shown in FIG. It is a figure which shows the 2nd Embodiment of the discriminator of this invention, (a) is a surface view, (b) is the cross-sectional view of AA'shown in (a), (c) is the base base material. It is a figure which shows the structure of the laminated surface with a protective layer. It is a figure which shows the 3rd Embodiment of the discriminator of this invention, (a) is a surface view, (b) is the cross-sectional view of AA'shown in (a), (c) is (a). The BB'cross-sectional view shown, (d) is a back view. It is a figure which shows the structure of the laminated surface with the protective layer of the base base material in the ID tag shown in FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First Embodiment)
1A and 1B are views showing a first embodiment of the discriminator of the present invention, in which FIG. 1A is a surface view, FIG. 1B is a sectional view taken along the line AA'shown in FIG. It is a figure which shows the structure of the laminated surface with the protective layer 30a of a base base material 10.

As shown in FIG. 1, the discriminator in the present embodiment is an ID tag 1 in which both sides of the base base material 10 are covered with protective layers 30a and 30b.

The base base material 10 is the first insulating layer in the present invention, and is made of an insulating material having a thickness of about 200 to 300 μm. As the insulating material, a resin film such as PET can be considered, but a material having a small dielectric loss tangent is preferable.

Twelve antennas 11a to 11l are laminated on the laminated surface of the base base material 10 with the protective layer 30a. Each of the antennas 11a to 11l has a thickness of, for example, about 18 μm, and is formed so that two linear portions orthogonal to each other intersect at their ends. Since the lengths of the linear portions of the antennas 11a to 11l are different from each other, the resonance frequencies at which the resonance peaks appear when facing the ground pattern 20 described later are different from each other. Then, the protective layer 30a is laminated on the entire surface of one surface of the base base material 10 so as to cover the antennas 11a to 11l. The protective layer 30a is the second insulating layer in the present invention, and is made of an insulating material such as PET having a thickness of 100 μm, and is laminated on the entire surface of one surface of the base base material 10. .. The protective layer 30a protects the antennas 11a to 11l from friction and the like.

Six additional patterns 31a to 31f, which are the second conductive layers in the present invention, are laminated on the surface of the protective layer 30a on the side opposite to the base base material 10. The additional patterns 31a to 31f are arranged to face the antenna selected according to the ID assigned to the ID tag 1 among the antennas 11a to 11l. In the present embodiment, the additional pattern 31a is arranged to face the antenna 11a, the additional pattern 31b is arranged to face the antenna 11b, the additional pattern 31c is arranged to face the antenna 11c, and the additional pattern 31c is arranged to face the antenna 11j. The additional pattern 31d is arranged, the additional pattern 31e is arranged facing the antenna 11k, and the additional pattern 31f is arranged facing the antenna 11l. The additional patterns 31a to 31f are laminated with a thickness of, for example, about 1 μm. It should be noted that the additional patterns 31a to 31f do not need to be stacked so as to cover all of the antennas as long as they are arranged so as to face at least a part of the antennas facing each other. In the present embodiment, the additional patterns 31a to 31f are laminated so as to cover one of two linear portions orthogonal to each other of the opposing antennas.

A ground pattern 20 serving as a first conductive layer is laminated on the entire surface of the laminated surface of the base base material 10 with the protective layer 30b. Like the antennas 11a to 11l, the ground pattern 20 has a thickness of, for example, about 18 μm, and is laminated on the entire surface of the other surface of the base base material 10 to cover the antennas 11a to 11l in a plan view. It has a shape. Then, the protective layer 30b is laminated on the entire surface of the other surface of the base base material 10 so as to cover the ground pattern 20. Like the protective layer 30a, the protective layer 30b is made of, for example, PET having a thickness of 100 μm, and is laminated on the entire surface of the other surface of the base base material 10. The protective layer 30b protects the ground pattern 20 from friction and the like. The thickness of the antennas 11a to 11l and the ground pattern 20 may be about 3 μm.

Hereinafter, a method for manufacturing the ID tag 1 configured as described above will be described.

FIG. 2 is a cross-sectional view for explaining the manufacturing method of the ID tag 1 shown in FIG.

When manufacturing the ID tag 1 shown in FIG. 1, first, the ground pattern 20 is laminated on the entire surface of one surface of the base base material 10 by screen printing using, for example, silver ink (FIG. 2A). Further, the antennas 11a to 11l are laminated on the other surface of the base base material 10 by, for example, screen printing using silver ink (FIG. 2 (b)). The ground pattern 20 and the antennas 11a to 11l may be laminated at the same time regardless of the stacking order. The ground pattern 20 and the antennas 11a to 11l are not limited to the coating method by screen printing using silver ink, for example, and may be configured by laminating a conductive material made of copper or aluminum, and the antenna 11a may be formed by etching. ~ 11 liters may be formed. Further, the ground pattern 20 is not limited to the one laminated on the entire surface of one surface of the base base material 10, and the ground pattern 20 faces the antennas 11a to 11l on one surface of the base base material 10, respectively, and is an antenna in a plan view. The configuration may be divided so as to be individually formed into a shape covering 11a to 11l. The antennas 11a to 11l and the ground pattern 20 are laminated by etching or fixed printing to secure a film thickness of about 3 μm. If the antennas 11a to 11l and the ground pattern 20 are thin, the resistance value becomes high and the resonance peak described later cannot be obtained. However, the antennas 11a to 11l and the ground pattern 20 may be etched. By laminating by fixed printing, a film thickness of about 3 μm can be secured, whereby a resonance peak can be obtained.

The general-purpose tag 2 is produced by laminating the antennas 11a to 11l and the ground pattern 20 on the front and back of the base base material 10 and then performing a firing process, and then the antennas 11a to 11l and the ground pattern 20 are placed on the front and back of the base base material 10. The protective layers 30a and 30b are laminated by covering them with a coating method of applying an insulating material such as PET having a thickness of 100 μm or thermocompression bonding by laminating (FIG. 2 (c)).

Then, additional patterns 31a to 31f are laminated on the surface of the protective layer 30a on the opposite side of the base base material 10 by thermal transfer printing using a desktop direct printer, for example, using an ink ribbon containing aluminum (FIG. 2 (d)). ). At this time, in the desktop direct printer, the positions of the antennas 11a to 11l with respect to the outer shape of the ID tag 1 are set in advance, and the antennas 11a to 11c and 11j to 11k are opposed to the antennas 11a to 11c and 11j to 11k according to the ID that can be identified by the ID tag 1. The additional patterns 31a to 31f will be laminated on the region to be used. While the desktop direct printer is capable of variable printing according to such an ID, it can print only with a thickness of about 1 μm. Therefore, when the antennas 11a to 11l and the ground pattern 20 are laminated by a desktop direct printer, the resonance peak cannot be obtained as described above because the thickness is thin. However, in the additional patterns 31a to 31l, even if the resistance value becomes high, it is possible to inhibit the resonance of the opposing antennas. Therefore, by laminating the additional patterns 31a to 31f by variable printing with a desktop direct printer, The ID using the resonance frequency of the antennas 11a to 11l can be changed.

The above-mentioned manufacturing method is an example for manufacturing the ID tag 1. First, the ground pattern 20 and the antennas 11a to 11l are arranged so as to face each other via the base base material 10, so that they can be used for general purposes. The tag 2 is prepared, and then the protective layer 30a is arranged on the side of the antennas 11a to 11l opposite to the base base material 10, and then an additional pattern is provided so as to face the antennas 11a to 11l via the protective layer 30a. Any process can be applied as long as 31a to 31f are selectively arranged.

The operation of the ID tag 1 manufactured as described above will be described below.

First, it will be described that the antennas 11a to 11l develop a resonance peak by facing the ground pattern 20.

In an antenna having a sharp resonance peak having a Q value of more than 30, the resonance peak does not appear when facing the ground pattern 20. On the other hand, in an antenna having a gentle resonance peak having a Q value of 30 or less, a sharp resonance peak having a Q value of 30 or more appears when facing the ground pattern 20. As described above, in order for the resonance peak to appear when facing the ground pattern 20, it is necessary that the Q value is 30 or less, or that the resonance peak does not occur with the antenna alone.

The Q value is defined as the frequency at the resonance peak being ω ₀ , the frequency at which the vibration energy is half the resonance peak on the lower frequency side than the resonance peak is ω _1, and the frequency is on the higher frequency side than the resonance peak. When the frequency at which the vibration energy becomes the half value of the resonance peak is ω ₂ , it is a value represented by Q = ω ₀ / (ω ₂ − _{ω 1).}

Therefore, even in the antennas 11a to 11l shown in FIG. 1, the Q value of the antennas 11a to 11l alone, that is, the Q value in the state of not facing the ground pattern 20 is 30 or less, so that the antennas 11a to 11l face the ground pattern 20. A sharp resonance peak with a value of 30 or more will appear.

Further, since the ground pattern 20 is provided so as to face the antennas 11a to 11l via the base base material 10, the surface of the base base material 10 opposite to the antennas 11a to 11l is held and used. Even when the dielectric is in contact with the surface of the base base material 10 opposite to the antennas 11a to 11l, the influence of the dielectric is not affected by the ground pattern 20, and the resonance peak due to the antennas 11a to 11l is detected. Will be.

Next, the action of the additional patterns 31a to 31f will be described.

FIG. 3 is a diagram for explaining the frequency characteristics of the ID tag 1 shown in FIG.

As described above, the antennas 11a to 11l laminated on the base base material 10 have different lengths of their linear portions, so that the resonance frequencies of the resonance peaks that appear when facing the ground pattern 20 are different from each other. It has become. For example, the resonance frequency of the antenna 11a is the lowest, followed by the antenna 11b, the antenna 11c, the antenna 11d, the antenna 11e, the antenna 11f, the antenna 11g, the antenna 11h, the antenna 11i, the antenna 11j, and the antenna 11k. , It is assumed that the resonance frequency of the antenna 11l is the highest. Then, in the general-purpose tag 2 in which the additional patterns 31a to 31f are not laminated, when the general-purpose tag 2 is irradiated with an electromagnetic wave and the reflected wave is received, the reflected wave in the reflected wave is as shown by a broken line in FIG. A resonance peak due to the antenna 11a appears at the point A, a resonance peak due to the antenna 11b appears at the point B, a resonance peak due to the antenna 11c appears at the point C, and a resonance peak due to the antenna 11d appears at the point D. Then, the resonance peak due to the antenna 11e appears at the point E, the resonance peak due to the antenna 11f appears at the point F, the resonance peak due to the antenna 11g appears at the point G, and the resonance peak due to the antenna 11h appears at the point H. Is expressed, the resonance peak by the antenna 11i is expressed at the point I, the resonance peak by the antenna 11j is expressed at the point J, the resonance peak by the antenna 11k is expressed at the point K, and the resonance peak by the antenna 11l is expressed at the point L. A resonance peak appears. Therefore, at each of the points A to L, the individual ID when the resonance peak is detected is set to "1", the individual ID when the resonance peak is not detected is set to "0", and these are set to have a low resonance frequency. By arranging them in order, the ID "111111111111" will be identified.

On the other hand, in the ID tag 1 in which the additional patterns 31a to 31f are laminated, when the ID tag 1 is irradiated with an electromagnetic wave and the reflected wave is received, the antennas 11a to 11l are shown by the solid line in FIG. In the antennas 11a to 11c and 11j to 11l with the additional patterns 31a to 31f facing each other, the resonance peaks are not detected at the points A to C and the points J to L, which are the resonance frequencies. Therefore, at each of the points A to L, the individual ID when the resonance peak is detected is set to "1", the individual ID when the resonance peak is not detected is set to "0", and these are set to have a low resonance frequency. By arranging them in order, the ID "000111111000" assigned to the ID tag 1 is identified.

In this way, among the antennas 11a to 11l laminated on the base base material 10, additional patterns 31a to 31f are selected for the antennas having the corresponding individual IDs of "0" according to the ID assigned to the ID tag 1. By arranging them facing each other, the ID "000111111000" assigned to the ID tag 1 can be identified, and when the number of antennas is n, 2 ⁿ IDs can be identified. Can be done. At that time, a general-purpose tag 2 is prepared in which the antennas 11a to 11l and the ground pattern 20 are uniformly provided regardless of the ID assigned to the ID tag, and then the ID tag among the antennas 11a to 11l is produced. IDs are identified using the antennas by stacking additional patterns 31a to 31f on the protective layer 30a facing the antennas 11a to 11c and 11j to 11l selected according to the ID assigned to 1. In the enabling discriminator, a configuration capable of identifying a desired ID can be easily realized without using a special device.

(Second embodiment)
4A and 4B are views showing a second embodiment of the discriminator of the present invention, in which FIG. 4A is a surface view, FIG. 4B is a sectional view taken along the line AA'shown in FIG. It is a figure which shows the structure of the laminated surface with the protective layer 30a of a base base material 10.

As shown in FIG. 4, the discriminator in the present embodiment is the ID tag 101 in which the print receiving layers 40a and 40b and the print layers 50a and 50b are laminated on the front and back of the ID tag 1 shown in FIG. 1, respectively.

In the ID tag 101 of the present embodiment, predetermined information is printed after the print receiving layer 40a is laminated so as to cover the additional patterns 31a to 31f on the entire surface of the protective layer 30a opposite to the base base material 10. As a result, the print layer 50a is laminated, and after the print receiving layer 40b is laminated on the entire surface of the protective layer 30b opposite to the ground pattern 20, the print layer 50b is printed with predetermined information. It is laminated. As a result, it can be used as a card on which information, patterns, etc. are displayed on the surface.

In this embodiment, the ID tag 101 in which the print receiving layers 40a and 40b and the print layers 50a and 50b are laminated on the front and back of the ID tag 1 shown in FIG. 1 has been described as an example. Even if the print receiving layer 40a and the print layer 50a are laminated on the surface on which the additional patterns 31a to 31f of the ID tag 1 shown in the above are laminated, the card can be used as a card on which information, patterns, etc. are displayed on the surface. be able to.

(Third embodiment)
5A and 5B are views showing a third embodiment of the discriminator of the present invention, in which FIG. 5A is a surface view, FIG. 5B is a cross-sectional view taken along the line AA'shown in FIG. BB'cross-sectional view shown in (a), (d) is a back view. 6A and 6B are views showing the internal structure of the ID tag 201 shown in FIG. 5, where FIG. 6A is a diagram showing the configuration of a laminated surface of the base substrate 10a with the protective layer 30a, and FIG. 6B is a diagram showing the configuration of the laminated surface of the base substrate 10a. It is a figure which shows the structure of the laminated surface with the protective layer 30b of 10b.

As shown in FIGS. 5 and 6, the discriminator in this embodiment has a base base material 10a, 10b and antennas 11a to 11l, 12a to 12l, respectively, on the front and back surfaces of the ground pattern 20 with respect to the one shown in FIG. The ID tag 201 is different in that the protective layers 30a and 30b and the additional patterns 31a to 31f and 32a to 32f are provided.

The ID tag 201 of the present embodiment has the same configuration as that shown in FIG. 1 in the arrangement of the additional patterns 31a to 31f with respect to the antennas 11a to 11l on one surface side of the ground pattern 20, but the ground. On the other side of the pattern 20, the arrangement of the additional patterns 32a to 32f with respect to the antennas 12a to 12l is different from that shown in FIG. The antennas 11a to 11l arranged on one surface side of the ground pattern 20 and the antennas 12a to 12l arranged on the other surface side of the ground pattern 20 have the same resonance frequency between the corresponding antennas. It has become a thing. Specifically, the antenna 11a arranged on one surface side of the ground pattern 20 and the antenna 12a arranged on the other surface side of the ground pattern 20 have the same resonance frequency, and one of the ground patterns 20 has the same resonance frequency. The antenna 11b arranged on the surface side and the antenna 12b arranged on the other surface side of the ground pattern 20 have the same resonance frequency, and the antenna 11c arranged on one surface side of the ground pattern 20 and the ground The antenna 12c arranged on the other surface side of the pattern 20 has the same resonance frequency, and the antenna 11d arranged on one surface side of the ground pattern 20 and the antenna 11d arranged on the other surface side of the ground pattern 20 are arranged. The antenna 12d has the same resonance frequency, and the antenna 11e arranged on one surface side of the ground pattern 20 and the antenna 12e arranged on the other surface side of the ground pattern 20 have the same resonance frequency. The antenna 11f arranged on one surface side of the ground pattern 20 and the antenna 12f arranged on the other surface side of the ground pattern 20 have the same resonance frequency and are arranged on one surface side of the ground pattern 20. The antenna 11g and the antenna 12g arranged on the other surface side of the ground pattern 20 have the same resonance frequency, and the antenna 11h arranged on one surface side of the ground pattern 20 and the other of the ground pattern 20 The resonance frequency is the same as that of the antenna 12h arranged on the surface side, and the antenna 11i arranged on one surface side of the ground pattern 20 and the antenna 12i arranged on the other surface side of the ground pattern 20 resonate with each other. The frequency is the same, and the antenna 11j arranged on one surface side of the ground pattern 20 and the antenna 12j arranged on the other surface side of the ground pattern 20 have the same resonance frequency, and one of the ground patterns 20. The antenna 11k arranged on the surface side of the ground pattern 20 and the antenna 12k arranged on the other surface side of the ground pattern 20 have the same resonance frequency, and the antenna 11l arranged on one surface side of the ground pattern 20 and the antenna 11l. The resonance frequency is the same as that of the antenna 12l arranged on the other surface side of the ground pattern 20. Then, on one surface side of the ground pattern 20, the additional pattern 31a is arranged to face the antenna 11a, the additional pattern 31b is arranged to face the antenna 11b, and the antenna is arranged in the same manner as that shown in FIG. The additional pattern 31c is arranged to face the antenna 11c, the additional pattern 31d is arranged to face the antenna 11j, the additional pattern 31e is arranged to face the antenna 11k, and the additional pattern 31f is arranged to face the antenna 11l. ing. On the other hand, on the other surface side of the ground pattern 20, the additional pattern 32a is arranged to face the antenna 12d, the additional pattern 32b is arranged to face the antenna 12e, and the additional pattern 32c is arranged to face the antenna 12f. The additional pattern 32d is arranged to face the antenna 12g, the additional pattern 32e is arranged to face the antenna 12h, and the additional pattern 32f is arranged to face the antenna 12i.

In the ID tag 201 configured in this way, when the electromagnetic wave is irradiated from the side provided with the antennas 11a to 11l and the additional patterns 31a to 31f and the reflected wave is received, the same as that shown in FIG. When the ID "000111111000" is identified and the electromagnetic wave is irradiated from the side provided with the antennas 12a to 12l and the additional patterns 32a to 32f and the reflected wave is received, the ID "111000000111" is identified. Become. At this time, when the electromagnetic wave is irradiated from the side where the antennas 11a to 11l and the additional patterns 31a to 31f are provided, the influence of the antennas 12a to 12l and the additional patterns 32a to 32f is not affected by the ground pattern 20 and the reflected wave is not affected. When the electromagnetic wave is irradiated from the side where the antennas 12a to 12l and the additional patterns 32a to 32f are provided, the influence of the antennas 11a to 11l and the additional patterns 31a to 31f is not affected by the ground pattern 20.

As described above, in the present embodiment, the arrangements of the additional patterns 31a to 31f and 32a to 32f with respect to the antennas 11a to 11l and 12a to 12l are different from each other on the front and back of the ground pattern 20, so that the antenna of the ID tag 201 is used. When electromagnetic waves are irradiated from the side provided with 11a to 11l and additional patterns 31a to 31f and the reflected wave is received, and electromagnetic waves are received from the side provided with antennas 12a to 12l and additional patterns 32a to 32f of the ID tag 201. It is possible to identify different IDs depending on whether the reflected wave is received by irradiating the antenna.

In this embodiment, the arrangement of the additional patterns 31a to 31f and 32a to 32f with respect to the antennas 11a to 11l and 12a to 12l has been described by taking as an example the case where the front and back sides of the ground pattern 20 are different from each other. Even if the arrangements of the ~ 31f, 32a to 32f with respect to the antennas 11a to 11l and 12a to 12l are the same on the front and back of the ground pattern 20, the base base materials 10a, 10b and the antenna 11a are placed on the front and back of the ground pattern 20, respectively. By providing ~ 11l, 12a to 12l, protective layers 30a, 30b, and additional patterns 31a to 31f, 32a to 32f, the ID can be identified independently from both the front and back sides of the ID tag 201. Even when a dielectric such as a hand is in contact with one surface of the ID tag 201, the ID can be accurately identified from the other surface.

Further, in the above-described embodiment, the antennas 11a to 11l have been described by taking as an example an antenna formed so that two straight portions orthogonal to each other intersect at the end thereof, but the shape of the antenna is different. Not limited to this, it is arbitrary as long as it has a rectangular outer shape and a resonance peak is detected by facing the ground pattern 20, such as one having a slit in the longitudinal direction from one of its short sides. The shape of can be applied.

Further, in the above-described embodiment, the ID can be identified by making the resonance frequencies of the plurality of antennas different from each other, but by making the directions of the antennas different from each other, the polarization directions are made different for each antenna, and the polarization is biased. The ID may be identifiable by the wave direction. In that case, priority is given in the polarization direction, and the individual IDs are arranged in the order according to the priority.

1,101,201 ID tag 2 General-purpose tag 10,10a, 10b Base base material 11a to 11l, 12a to 12l Antenna 20 Ground pattern 30a, 30b Protective layer 31a to 31f, 32a to 32f Additional pattern 40a, 40b Print receiving layer 50a , 50b print layer

Claims (5)

It has a first conductive layer and a plurality of antennas that are provided so as to face the first conductive layer via the first insulating layer and that generate a resonance peak by facing the first conductive layer. The first conductive layer has a shape that covers the antenna in a plan view, and the ID can be identified by the resonance frequencies or polarization directions of the plurality of antennas being different from each other.
The second conductive layer faces at least a part of the at least one antenna selected according to the ID among the plurality of antennas via the second insulating layer on the side opposite to the first conductive layer. Placed ,
The first and second insulating layers, the plurality of antennas, and the second conductive layer are discriminators provided on the front and back sides of the first conductive layer, respectively. In the discriminator according to claim 1,
The antenna is an discriminator having a Q value of 30 or less in a state where it does not face the first conductive layer. In the discriminator according to claim 1 or 2.
A discriminator in which a print receiving layer and a print layer are arranged in this order so as to cover the second conductive layer on the surface side of the second insulating layer provided with the second conductive layer. The method for manufacturing an identification body according to any one of claims 1 to 3.
A step of producing a general-purpose tag by arranging the first conductive layer and the antenna so as to face each other via the first insulating layer.
A step of arranging the second insulating layer on the side of the antenna opposite to the first conductive layer,
A method for manufacturing a discriminator, which comprises a step of arranging the second conductive layer so as to face the antenna via the second insulating layer. In the method for manufacturing an identification body according to claim 4,
The first conductive layer and the antenna are laminated on the front and back of the first insulating layer by a coating method using a conductive material or etching, respectively.
The second insulating layer is laminated on the first insulating layer on which the antenna is laminated by a coating method or thermocompression bonding.
A method for manufacturing a discriminator, in which the second conductive layer is laminated on the side of the second insulating layer opposite to the antenna by thermal transfer using a conductive material.

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